Where is my TCU?????

[Project_S13_180]

i need to replace my TCU, i know its by my drivers side kick panel and its a white box...but where is it? i see one white box behind my kick panel and thats for my door chime...where is that thing at? my gauge lights dont work, there is another s13 im getting a TCU from but i cant get it til i figure out what it looks like...so somebody send me a pic or describe in great detail for me, thanks

[0range_240]

is that a STICKER of an intercooler on the front???!

[Kiwi_S13]

Take the kick panel off and it is plainly visible - a small white box about 2x2x1 with one small harness running in. It is only held on with one bolt/screw if i remember correctly. And the appropriate term is TCM.

[L0sT]

this is what it should look like...sorry if its small, its from my phone

copy n paste into a new window if u cant click it

[Project_S13_180]

sticker of a intercooler?????? elaborate for me :-D

[Project_S13_180]

the picture wont show up for me :-(

[L0sT]

[Project_S13_180]

thanks, i just got a TCM and my lights work!!! its SICK! thanks for the help

[L0sT]

that is it though..right? cuz i gota change mine too lol

[Project_S13_180]

yeah thats it, only takes about 5 minutes to change out the old and put the new one in..probly not even that

[L0sT]

damit, i got one from a 93 240 and it still dont work...do u have a analog or digital/hud cluster?

[Kiwi_S13]

Lost - Have you installed a new stereo lately? Did it blow when you did (if you did).. If this is the case you need to REWIRE your system to bypass the factory amps.

EDIT - Or the new one could be blown.. This seems like a very common problem lately. Open the TCM up and check it visully for burns on the circut board. They should be quite obvious.

[L0sT]

nope, the new TCM looks fine, no burn marks or anything...so a new deck can blow the TCM? how do i rewire it to bypass the amps?

[Kiwi_S13]

I don't remember exactly. I know the illumination wire should NOT be hooked up, and I think you need to have the power antenna wire and amp wire come together... Search though it has been a long time and I dont remember completely. Good luck.

Post Script - Lost you might need another tcm. The second could have blown too.

[swtslvrmonkey]

hey guys, same thing happened to me, i have a 90 240sx, and when ig ot it it had no dash lights, so i figured either the light bulbs burned out or there was a short in the wire, but obviously not, since i removed the whole gauge cluster, and so i came upon this thread and read abotu the TCM circuit board, and i decided to give it a shot and took it out, and certainyl enough i foudn out one of the circuit boards was burned, so i was fortunate to find the problem, until yesterday when i bought another TCM from my local junkyard. I checked to see if there was any circuit lines burned out, and no. I put it in, connected it and plugged my battery and everything. As soon as i turned ont he switch, bam i start smellin smoke, and i took out the TCM again, and sure enough the same exact circuit line that burned out ont he other one, it happened to this one as well. I have a stereo hooked up as well, but im not too sure how the whole stereo wiring goes and how it affects all my dashboard lights, (i sortof need a visual wiring diagram of some sort since im a newbee at this) ALl of my other lights work, pretty much everything, jsut the dashboard and everything is not lighitng up. I know for a fact the reason why my tachometer aint workin. Do u think its because of the SR20DET engine i got there that could be the problem? let me knwo guys, i would appreciate it, sorry bout the mispells. thanks

[swtslvrmonkey]

o and i need to change my tachometer gauge to that of a newer 240, sorry i made it sound like i dont knwo what to do with my non-workin tachometer, my main problem is those darn dashboard lights.

[IveBeenBad]

anyone know how much one of these is from a dealer?

[Kiwi_S13]

Ive seen/heard anywhere between $150 - $300.

Junkyard = ~$10

[swtslvrmonkey]

mine was for free ^-^

[alex7542]

Whats tcu??

[alex7542]

IS it throttle control unit

[Kiwi_S13]

tcu - transmission control unit TCM - timing control module (which is what this thread is about)

[alex7542]

Could the tcm cause no spark. if it does back?

[alex7542]

my bad i meant break

[Kiwi_S13]

No.. Check your car for codes - and start a new thread.

[alex7542]

ok. thanks. To check for codes i take the ecu off and read the lights right.

[black240sx93]

I was woundering if any one knows if the TCM can make the gauge cluster not to work.

[sdtouge]

if you have s13 with h.u.d they just dont work anymore. i tihnk there are like 3 people in the world that have theirs still working.

if you want a spedo get a turbo timer...

[black240sx93]

Don't have hud.I have a 1993 s13 Hatchback.

[sdtouge]

ok. have no clue then,,,